Can I enforce escapeing on XML reserved chars?

Dear All,

We have a constraint attribute which can contain Xpath statements e.g.

"count(glossaryOfTerms) < 1"

& other places where people have to insert XML fragments as examples of 
what a message etc should look like.

Is there any way to enforce the above becoming :

"count(glossaryOfTerms) &lt; 1"


?


TIA


Adam


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